National Instruments 321645c-01 用户手册
Chapter 2
Function Reference — GPCTR_Set_Application
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National Instruments Corporation
2-215
NI-DAQ FRM for PC Compatibles
GPCTR_Set_Application
Format
status = GPCTR_Set_Application (deviceNumber, gpctrNum, application)
Purpose
Selects the application for which you use the general-purpose counter.
Parameters
Input
Parameter Discussion
Legal ranges for gpctrNum and application are given in terms of constants that are defined
in a header file. The header file you should use depends on which of the following languages
you are using:
in a header file. The header file you should use depends on which of the following languages
you are using:
•
C programmers—
NIDAQCNS.H
(
DATAACQ.H
for LabWindows/CVI)
•
BASIC programmers—
NIDAQCNS.INC
(Visual Basic for Windows programmers should
refer to the
section in Chapter 1,
, for more information.)
•
Pascal programmers—
NIDAQCNS.PAS
gpctrNum indicates which counter to program. Legal values for this parameter are shown in
Table 2-20.
Table 2-20.
Name
Type
Description
deviceNumber
i16
assigned by configuration utility
gpctrNum
u32
number of the counter to use
application
u32
application for which to use the counter